<template>
  <el-container class="home-container">
  <!-- 头部区域 -->
  <el-header>
  <div>
   <img src="../assets/heima.png" alt="">
   <span>电商后台管理系统</span>
  </div>
   <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!-- 页面主体区域 -->
  <el-container>
  <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'">
    <div class="toggle-button" @click="toggleCollapse">|||</div>
    <!-- 侧边栏菜单区域    :unique-opened="true" 可简写 unique-opened -->
    <el-menu background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
      <!--一级菜单-->
      <el-submenu :index="item.id + ''"  v-for="item in menulist" :key=" item.id">
      <!--一级菜单模板区域-->
        <template slot="title">
      <!--图标-->
          <i :class="iconsObj[item.id]"></i>
      <!--文本-->
          <span>{{item.authName}}</span>
        </template>
      <!--二级菜单-->
          <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
                <!--二级菜单模板区域-->
        <template slot="title">
      <!--图标-->
          <i class="el-icon-menu"></i>
      <!--文本-->
          <span>{{subItem.authName}}</span>
        </template>
          </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
  <!-- 右侧内容主体 -->
    <el-main>
    <!-- 占位符 -->
    <router-view></router-view>
    </el-main>
  </el-container>
</el-container>

</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  // 获取所有左侧菜单
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
      console.log(res.data)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      // isCollapse取反
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%
}
.el-header {
  background-color: #373d41;
  display:flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color:#fff;
  font-size:20px;
  //嵌套
  >div {
    display:flex;
    align-items:center;
    span {
      margin-left:15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px
}
.toggle-button {
  background-color:#4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer
}
</style>
